The objective of the invention is to utilize the manufacturing of sino type blue bricks kiln according to China's national situation is the gac with low cost of raw material with the coal.

The present invention combines reduction reaction that makes the adobe paleness and the gac activatory oxidizing reaction that is had in the blue bricks kiln, utilizes the heat of roasting blue bricks to make a charing of gac, activation, can produce blue bricks and gac simultaneously.

The present invention makes the method for granulated active carbon with black brick kiln, and it is characterized in that adopting hard coal is raw material, and method steps is as follows:

(1) raw material gives processing

A. coal separation guarantees below 10% coal ash,

B. powder process makes granularity reach d ₈₅The 180-200 order,

C. mix and pinch, coal dust, coal tar, water are pressed 65-70%, 20-25%, the part by weight of 10-15% mixes,

D. grind and practice, further be mixed and made into for the shaping blank stick,

E. moulding through grinding experienced stick at forming under the pressure, is made suitable activatory billot,

F. tinning after the billot drying, is weighed and is changeed jar,

(2) loading of kiln

Install the activation pot of billot and adobe with 1: 8-1: 15(quantity than) the ratio loading of kiln,

(3) firing

A. the fire stage before: begin to reach 600 ℃ from igniting to temperature, time 70-75 hour,

B. moderate heat stage: temperature 600-800 ℃, time 40-60 hour,

C. the back fire is stage: temperature 800-950 ℃, and time 45-60 hour, 4-6 hour began slowly to drink water from the Tianchi before the back fire finished.

D. the cooling stages of drinking water: cut off the water and make a fire, normal drinking-water makes temperature reduce to 40-50 ℃, time 60-75 hour.

The said activation pot of the present invention is meant porosity active jar at 25-30%, can oneself make, and each proportion of raw materials (weight ratio) is:

Bauxitic clay grog 25-35%

Bauxitic clay raw material 30-40%

Coal gangue or boiler ash sediment 5-10%

Clay 20-30%

The granularity of each several part raw material all should＜1.5mm, add water and make paste plaster mould moulding, make diameter 180-mm, high 120mm, wall thickness 10mm's is wet jar, the 800-850 ℃ of following roasting in Brick Kiln of dry back 100 hours was finished product.

The activity jar that raw material is packed into burned after giving processing, loading of kiln then.The loading of kiln scheme that the present invention adopts is: (1) with the adobe bottoming, this is that the bottom is low because the temperature distribution of whole kiln body is the top height, high temperature be by

On down shift, conduct heat by middle mind-set limit portion, though lower curtate limit portion also can reach the needed temperature of activation, because of the reaction times short, do not reach the purpose of deep activation, half-cooked easily; (2) the kiln wall is put adobe, and purpose is for further being incubated and avoiding cold zone; (3) adobe is pressed at the top, prevents that gac from drenched by water when the drink kiln; (4) around the blue fire and top stacks bricks, and causes the ashing of gac raw material in order to avoid Yin Wendu is too high; (5) adobe and activation pot are advisable with alternate being arranged in parallel, and Figure 1 shows that the areal distribution that loads in mixture in the kiln.

The loading of kiln quantitative proportion of activation pot and adobe is 1 in the multifuel combustion method of the present invention: 8-1: 15, and optimum proportion is 1: 10.Activate and cannedly must measure greatly, activation phenomenon is not enough, causes half-cooked material easily, in addition can be more concentrated, and the brick around making jar burns stream because of the activation pot liberated heat, if activate very fewly cannedly, then cause gac output to reduce, and lost the meaning of multifuel combustion method.

The crucial part of multifuel combustion method is in firing, in the gac manufacturing processed of routine, charing and activation two processes that are undivided, and in the multifuel combustion method, charing and activation are then once finished in the blue bricks kiln, therefore, grasp charing and activatory condition, decision firing processing condition are most important.In the present invention, the charing of billot is mainly finished in the preceding fire stage, billot has much relations with pyrogenic speed in charing, coking speed is fast, and the gac hole that makes is little, intensity big (be difficult to activate and cause), coking speed is fast, and the gac porosity that makes is big, high adsorption capacity, but intensity is low, so coking speed must be suitable.Activation is to carry out under the mixed gas effect of carbonic acid gas, water vapor and oxygen.Reaching more than 850 ℃ the carbonic acid gas activation in moderate heat latter stage temperature begins, and steam activation just begins after the drinking-water beginning of the later stage in back fire stage, the activation situation of three kinds of gases is seen Fig. 2, as seen from the figure, three kinds of activator gases are wherein the longest with the carbon dioxide residence time, and oxygen and water vapor take second place.For brick with klining system, the back fire stage of multifuel combustion requires reducing atmosphere, and the intravital carbon monoxide atmosphere of kiln helps the adobe paleness, and the carbon dioxide of discharging in the brick helps the further activation of gac, therefore, brick and gac multifuel combustion all are favourable to the two.

The firing technology of multifuel combustion of the present invention is divided into four-stage:

A. the fire stage before: begin just be the preceding fire stage to blue thermal transfer that temperature is an oxidizing atmosphere in normal temperature-600 ℃ this stage kiln from igniting, its effect is humidity discharging, and the preliminary carbonization time of gac is needed 65-75 hour, seals the Tianchi when humidity discharging finishes,

B. moderate heat stage: temperature is from 600-800 ℃, and the time needs 40-60 hour, and this stage mainly is to make fire burn limit portion from the centre, and it is even to reach full kiln temperature.In the kiln is weak oxide atmosphere, make the carbonized material temperature be increased to the activatory optimum temps, and under carbon dioxide atmosphere, carbonized material is activated,

C. the back fire is stage: temperature 800-950 ℃, and the time needs 45-60 hour, reduces the air input, is mainly reducing atmosphere in the kiln, and full kiln temperature is even, and gac continues at CO ₂Activate under the atmosphere, before the back fire finishes, slowly drank water from the Tianchi in 4-6 hour, in kiln, cause CO ₂With the mixed atmosphere of water vapor, promote the activation process, and make brick by red stain green grass or young crops.

D. drink the kiln cooling stages: stop to make a fire, normal drinking-water makes kiln body temperature degree reduce to 40-50 ℃ gradually, and the time needs 60-75 hour, the kiln temperature descends gradually, and making does not have the good material of activation to continue to activate the blue bricks fixation, cause the water vapor malleation in the whole kiln, prevent air admission, avoid gac to burn and lose ashing.After the cooling of kiln body, with blue bricks and the gac difference kiln discharge that bakes.Gac by the every index of standard analysis, dispatches from the factory through the gac packing of chemically examining after qualified after screening.

Multifuel combustion method of the present invention is that coal is that raw material manufacturing active carbon is opened new technical process of out-of-the-way radium, this technical process is simple, small investment, as calculating with the saddle furnace gauge, retort need be invested 250,000 yuan, and activation furnace need be invested 800,000 yuan, amount to 1,050,000 yuan, just need invest ten thousand yuan of 3-4.5 and build 30 blue bricks kilns, and giving of raw coal process device therefor and be approved product, do not need in addition special equipment. Because the mutual of atmospheric condition in manufacture process replenished for adobe and active carbon, both sides are conducive to the separately raising of quality, and the volatile matter of emitting in the carbonization process further burns, and have replenished the heat energy of burning, therefore can make former baking bricks save about 20% with coal, eliminate simultaneously atmosphere pollution. Used raw coal can be anthracite, estimation is done the easier activation of raw material with bituminous coal, the firing condition has suitable change possibly, can make difform active carbon according to the moulding process of feed change with the apricot charcoal alive of this method manufacturing, such as garden cylindricality, sphere etc.

The present invention makes the method for active carbon under the prerequisite of burned blue bricks kiln, and active carbon just can reach qualified products, therefore, skilled burner is not needed independent training. Prepared active carbon can with purify waste water, solvent recovery, do catalyst carrier and desulfurization etc.